Noticed this week that I'm sticking right at the point where I have to reach my chin up to get over the bar.

Looking at the Crossfit WOD's they say thats cheating pretty much. I assume that means you need to keep looking straight ahead and pull to the chest. Or at the least looking straight ahead the chin gets over the bar as you pull to the chest. Hope that doesn't sound confusing.

Anyway,

Do you think its better to gut it out and pull for all I can to get the full reach or should I substitute (i.e. jumping pullups with a slow negative) when I reach that sticking point? (doing a negative count as a rep?)

Also if I get my chin over the bar but I'm "reaching" I would assume it doesn't count as a rep right? I look at my pushups like that. If my nose and chest don't touch the floor I don't count it.

Ok, still another question. Is a jumping pullup with a negative the best exercise to fix that sticking point? Or should I rest even longer?
I'm literally about one to two inches from gettin over the bar without cheating.

Ok sorry about being long winded on this. Just want to make sure I'm doing it right. Thanks.

I second pytron; imagine not just pulling up, but pushing down with your elbows and try to get a little more explosive power into at least the first few reps to power yourself up and over I found that's helped me the most.